Discourse analysis focuses only on linguistic forms of communication. On the other hand, critical discourse analysis goes further to examine what language can do in relation to context/situation, targeted participants and how language portrays power etc
Phenomenological discourse analysis of discourse and its linguistic structure.
Critical textual analysis of the social and political function of discourse, and how a range of things are used in reality.
The other fundamental difference is in the depth and purpose of the analysis. While discourse analysis professionals understand how language works, a Portuguese coach understands how language is used by the world around us.